patternparser.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
 
#ifndef _LOG4CXX_HELPER_PATTERN_CONVERTER_H
#define _LOG4CXX_HELPER_PATTERN_CONVERTER_H
 
#include <map>
#include <vector>
#include <functional>
#include <log4cxx/helpers/class.h>
#include <log4cxx/pattern/patternconverter.h>
#include <log4cxx/pattern/formattinginfo.h>
 
namespace log4cxx
{
namespace pattern
{
 
typedef std::function<PatternConverterPtr(const std::vector<LogString>& options)> PatternConstructor;
typedef std::map<LogString, PatternConstructor> PatternMap;
 
 
// Contributors:   Nelson Minar <(nelson@monkey.org>
//                 Igor E. Poteryaev <jah@mail.ru>
//                 Reinhard Deschler <reinhard.deschler@web.de>
 
class LOG4CXX_EXPORT PatternParser
{
        static const logchar ESCAPE_CHAR;
 
        enum
        {
            LITERAL_STATE = 0,
            CONVERTER_STATE = 1,
            DOT_STATE = 3,
            MIN_STATE = 4,
            MAX_STATE = 5
        };
 
        PatternParser();
 
    private:
        static size_t extractConverter(
            logchar lastChar, const LogString& pattern,
            LogString::size_type i, LogString& convBuf,
            LogString& currentLiteral);
 
        static size_t extractOptions(const LogString& pattern, LogString::size_type i,
            std::vector<LogString>& options);
 
    public:
        static void parse(
            const LogString& pattern,
            std::vector<PatternConverterPtr>& patternConverters,
            std::vector<FormattingInfoPtr>& formattingInfos,
            const PatternMap& rules);
 
    private:
        static PatternConverterPtr createConverter(
            const LogString& converterId,
            LogString& currentLiteral,
            const PatternMap& rules,
            std::vector<LogString>& options);
 
        static size_t finalizeConverter(
            logchar c, const LogString& pattern, size_t i,
            LogString& currentLiteral, const FormattingInfoPtr& formattingInfo,
            const PatternMap&  rules,
            std::vector<PatternConverterPtr>& patternConverters,
            std::vector<FormattingInfoPtr>&  formattingInfos);
 
        static bool isUnicodeIdentifierStart(logchar c);
        static bool isUnicodeIdentifierPart(logchar c);
 
 
};
 
}
}
 
 
#endif